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package br.ufc.virtual.pregnant.servlets.disciplina;

import br.ufc.virtual.pregnant.entidades.Disciplina;
import br.ufc.virtual.pregnant.persistencia.DisciplinaDAO;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Leonardo Oliveira Moreira
 * 
 */
public class ListarDisciplinaServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/xml;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            String xml;
            DisciplinaDAO disciplinaDAO = null;
            try {
                disciplinaDAO = new DisciplinaDAO();
                xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
                List<Disciplina> disciplinas = disciplinaDAO.getDisciplinas();
                if (request.getParameter("codigo") != null && request.getParameter("codigo").trim().length() > 0) {
                    Disciplina d = disciplinaDAO.getDisciplina(request.getParameter("codigo"));
                    xml += d.toXMLString();
                } else {
                    xml += "<disciplinas>";
                    for (Disciplina d : disciplinas) {
                        xml += d.toXMLString();
                    }
                    xml += "</disciplinas>";
                }
            } catch (SQLException ex) {
                if (disciplinaDAO != null) {
                    try {
                        disciplinaDAO.rollback();
                        disciplinaDAO.close();
                    } catch (SQLException ex1) {

                    }
                }
                xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
                xml += "<erro>" + ex.getMessage() + "</erro>";
            }
            out.println(xml);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}